ISSN 2398-2950      

Actinomyces pyogenes

ffelis
Contributor(s):

Melissa Kennedy

Synonym(s): Corynebacterium pyogenes


Introduction

Classification

Taxonomy

  • Genus: Actinomyces (Arcanobacterium).
  • Family: Actinomycetaceae.
  • Order: Actinomycetales.

Etymology

  • Gk: actino myces- ray fungus; pyogenes- pus-producing.

Active Forms

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Clinical Effects

Epidemiology

Habitat

  • Colonizes the mucous membranes and skin of susceptible species.

Lifecycle

  • Reproduces on the mucous membranes of the host by binary fission.

Transmission

  • Endogenous infection.
  • Bites.

Pathological effects

  • Killed by phagocytes.
  • Man: cell-mediated and humoral allergy - circulating antibody, produced during infection does not confer protection.
  • Specific resistance, if any, is probably cell mediated.
  • Trauma or infection by another agent   →   stimulates latent infection   →   active infection (Actinomycosis Actinomycosis)   →   pyogranulomatous reaction (bacterial colonies with suppuration)   →   surrounding granulation, mononuclear infiltration and fibrosis.

Cattle, sheep and pigs

  • Suppurative mastitis (acute and chronic).
  • Suppurative pneumonia.
  • Septic arthritis.
  • Endometritis.
  • Umbilical infections.
  • Wound infections. Abscesses.
  • Mixed infections withFusobacterium necrophorum.

Bulls and boars

  • Seminal vesiculitis.

Cattle alone

  • Summer mastitis (mixed infection with an anaerobe, eg Peptostreptococcus indolicus).
  • Vegetative endocarditis.

Other Host Effects

  • Present on host's skin and mucous membranes - mouth or orophanynx, secondarily gastrointestinal tract.

Control

Control via animal

  • Drainage of abscesses.

Control via chemotherapies

  • Penicillin G Benzylpenicillin, tetracycline Tetracycline, trimethoprim-sulfamethoxasole Trimethoprim.
    Response to treatment in summer mastitis is disappointing, presumably due to involvement of other bacteria.

Vaccination

  • None.

Diagnosis

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Lynch M, O'Leary J, Murnaghan D et al (1998) Actinomyces pyogenes septic arthritis in a diabetic farmer. J Infect 37 (1), 71-73 PubMed.
  • Carlson P, Kontiainen S (1994) Evaluation of a commercial kit in the identification of Arcanobacterium hemolyticum and Actinomyces pyogenes. Eur J Clin Microbiol Infect Dis 13 (6), 507-509 PubMed.

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!

 
 
 
 

To show you are not a Bot please can you enter the number showing adjacent to this field

 Security code